Machine for making hollow building-blocks.



H. S. SCOTT & M. L. DILGARD.

MACHINE FOR MAKING HOLLOW BUILDING BLOCKS.

APPLICATION FILED MAR.12,1906.

Patented Nov. 23; 1909.

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H. S. SCOTT & M. L. DILGARI).

MACHINE FOR MAKING HOLLOW BUILDING BLOCKS. APPLICATION FILED 14113.12,1906.

940,741. v Patented Nov. 23,1909.

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APPLICATION FILED HAB..12, 1906.

940,741i Patented Nov. 23. 1909.

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Y H. S. SCOTT & M. L. DILGARD.

MACHINE FOR MAKINGHOLLOW BUILDING BLOCKS.

APPLICATION TILED MAR.12, 1906.

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940,741. Patented Nov. 23-, 1909.

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HORATIO S. SCOTT AND MONTIS L. DILGARD, OF ASHLAND, OHIO, ASSIGNORS TOC. V7.

LANDIS, ALLEN THOIVIAS, AND U. S. SHELLY, ALL OF ASHLAND, OHIO.

MACHINE FOR MAKING HOLLOW BUILDING-BLOCKS.

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Specification of Letters Patent.

Patented Nov. 23, 1909.

Application filed March 12, 1906. Serial No. 305,478.

To all whom it may concern:

Be it known that we, Hona'rro S. Soo'r'r and Mon TIS L. DILGARD, bothcitizens of the United States, and both residing at Ashland, in thecounty of Ashland and State of Ohio, have invented a certain new anduseful Improvement in Machines for Making Hollow BuildingBlocks, ofwhich the following is a full, clear, and exact description.

The object of this invention is to produce a machine with which hollowconcrete building blocks of various sizes may be made cheaply and fromwhich they may be removed quickly and without injury.

The invention consists in the construction and combination of partshereinafter described and definitely pointed out in the claims. v

In the drawings, Figure l is a plan view of the machlne embodying theinvention. Fig. 2 is a front elevation partly in section in the planeindicated by line 22 of Fig. 1.

Fig. 3 is a sectional end view in the plane indicated by line 3-3 ofFig. 1 when the cores are withdrawn from the mold. Fig. l is a similarsection when the mold is open; and Fig. 5 is a front view of so much ofthe device as is shown in Fig. 4.

Referring to the parts by letters, A A represent the two end members ofthe machine frame. The back plate B of the mold is adjustably secured bybolts to the front faces of vertical posts a, a, which are upwardextensions of said frame members.

The front plate I) of the mold has laterally extended trunnions at itsends near its lower edge,which trunnions enter holes in the framemembers, whereby said front plate is pivoted to said members. This frontplate has, near its ends, two arms (Z cl which are located close insidethe frame members, and in such position that they will respectivelyengage with the two lugs a a, on the inner faces of said frame memberswhen the front plate D has been swung into horizontal position, as it iswhen the mold is to be opened.

' hen the arms cl d have come into en a 'ement with the lugs a a, saidlugs serve as stops preventing further movement of said arms 1], andconsequently of the front plate D.

The bottom plate E of the mold has two forwardly extended fingers ewhich pass loosely through loops d on the lower edge of the front plate,whereby the front edge of the bottom plate is supported.

The end plates C C are hinged at 0 to the ends of the front plates andeach of said end plates has on its lower edge an inwardly extendedfinger0, adapted to extend under the bottom plate near the rear edge of thelatter, and thereby support it.

On the front face of the rear plate near its ends are the verticalbeveled ribs 6, 6, whose function is to engage the outer beveled edgesof the end plates and thereby close them tightly and hold them closed.

By reason of the described construction, the bottom plate and end platesare locked in their closed positionsthat is to say, the

ribs 6 prevent the ends from swinging open, and the fingers e preventthe bottom plate from swinging down.

In the back plate B are horizontal holes through which the cores F passhorizontally. These cores are preferably approximately elliptical incross section and each has a rearwardly extended guide stem whose rearend goes loosely through and is adapted to be supported by a fixedhorizontal bar G. This bar is rigidly connected with the rear ends oftwo side bars G having on their front ends inwardly directed flanges gwhich engage with the front face of the back plate B to which they aresecured by bolts. These bars G G constitute a rearwardly extended framefor partially supporting and guiding the cores and it is to be notedthat this frame is attached to the back plate of the mold. A bar Hpasses through holes in all of the stems f. Two rearwardly extendinglinks J are pivoted to the back plate; and in their rear ends'a rockshaft K is mounted. Two arms 7a 7a are made fast to this rock shaft, andare pivotally connected with the bar H. An operating handle L is alsosecured to the rock shaft, whereby to rock the same and thereby to causethe cores to slide forwardly or rearwardly, as required,

The top portions 6 of each end plate are removable. They are providedwith downwardly extending fingers e which are secured to the end platesby bolts or other suitable means. These removable top edges of the endplates may be removed to reduce the depth of the mold; and'other platesof different widths may, if desired, be substituted tomake' the mold anydepth required. The

height of the front of the mold is deterward the split core embraces thedivision mined by the width of the pallet board P, which is removablyplaced in the mold against the front plate thereof.

It is, of course, desirable that the cores in the blocks formed in themold shall be centrally placed. By changing the depth ofthe mold bymeans of these extension pieces 6 the cores F are put out of center. Toavoid this the back plate is adjustable up and down upon the posts a.One has only to remove the bolts by which it is attached to said postsand raise or lower the plate as required, and then put the bolts throughother holes in said posts. By raising and lowering the back plate thecores and their operating and supporting mechanism are correspondinglyraised.

A vertical slot g is extended down through one or more of the cores. Itis intended for the passage of a plate M whose width is equal to thedistance between the front and back plates of the mold. As many of thecores as desired may be provided with these slots, and therefore theremay be as many independent .blocks formed simultaneously in the mold asrequired, and of any size less than the full size of the mold. Thebottom plate is finished on its top surface in whatever pattern it isdesired to produce on the face of the building block formed in the mold.In order to make the smaller blocks produced in the mold when it isdivided by plate M with similar beveled edges, a removable block N isprovided which is placed on the bottom of the mold, and it has a slot ainto which the lower edge of the division plate M may be extended. Thefaces of this block, on opposite sides of the division plate arebeveled, as are the marginal edges of the bottom plate, so that theedges of the small blocks formed in the mold, when it is divided asdescribechwill also have beveled edges.

It will be understood that the split core may be placed anywhere, as asubstitute for any of the unsplit cores. Therefore the mold may bedivided by the division plate M and movable block N, as required. Forexample, if the mold be twenty-four inches long, and the distancebetween core centers be four inches, the split core, the division plateM and block N, may be placed as shown in Fig. 2. Then one may make inthe mold two blocks respectively eight and sixteen inches long. If thesplit core be placed in the middle opening, and the division plate M andblock N placed in proper relation to it, then two blocks twelve incheslong may be made in the mold. It is to be noted that although the blockN is disconnected from the bottom plate, and is freely movable thereonwhen the cores are drawn backward, nevertheless when the cores are movedforplate and holds it and block N immovable.

In using the machine a pallet board P is placed vertically in the moldagainst the front plate thereof. Then the cores are moved forward untiltheir ends touch this board. The plastic material is then put into themold and tamped down,the mold being filled up to the level of the top ofthe ends and front side. Then the cores are withdrawn. Then the operatortakes hold of the two laterally extending handles 6 on the end platesand swings all of the mold, except the back plate, forward on thetrunnions d. The end plates are then swung outward, leaving the finishedblock resting on the pallet board, which in turn rests upon the thenhorizontal front mold plate. The bottom plate E will, during thismovement of the mold, be moved upward, but will not reach a verticalposition because of the character of the connection between it and thefront plate D,that is to say because the fingers 6 pass loosely throughthe loops (Z This permits the plate E to have a slight movementindependent of the front plate D and this independent movement resultsin the bottom plate E taking the position as shown in Fig. at, in whichit is out of contact with the block which has been formed in the moldand which, by the movement of the mold, has come to rest upon thehorizon tal front plate D of said mold.

It will be noted that the two cores at the ends of the mold are halfellipses only in cross section. These, therefore, leave half ellipticalgrooves in the end faces of the finished building block. Heretofore thegrooves in the ends of the building blocks have been produced by coresattached to the end plates. This method, however, is objectionable forthe reason that the building blocks, when molded, are in a more or lessplastic condition and the material adheres more or less strongly to theend plates. The withdrawal of the end plates having such cores attachedto them tends to pull the then plastic ends of the block out of shape,aresult which is avoided by the use of the half cores shown in thedrawings.

lVhen the end plates of the mold have been swung down the bottom plate,which is then in a vertical position, is allowed to swing rearward alittle, but enough to withdraw it from contact with the recently moldedblock, thereby leaving the block disconnected with everything except thepallet board upon which it may be taken from the mold to the dryingroom.

Special attention is called to the fact that the back plate B isadjustable vertically upon the standards or end frames A so as to deepenthe mold and enable us to build blocks of different depths. For example,if

the mold be arranged to build. blocks S 8 2et, we can deepen the mold soas to make the blocks 9 or 10 or 12 inches in depth vertically accordingto the adjustment of the plate 13 in the holes shown in frame extension(4, Fig. 2. It will be noticed in this connection that the said back Bhas width sufficient to enable this to be done, as it is wider than themold ordinarily requires. Not only is this adjustment provided for, butit is to be further observed as a feature of construction peculiar tothis machine that the frame G G by which the cores are supported isbolted to said back plate and not to the standards A. Hence the coresare raised and lowered with the said plate and work equally well at allelevations. In this ctmnection, it is also to be observed that theextensions 0 of the end plates are adapted to conform to the deepeningof the mold by raising the back plate, and of coursesuitable boards orplanks P having a corresponding depth, will be employed in such cases.

Having described our invention, we claim:

1. In a machine for molding building blocks, the combination of framemembers having inwardly projecting lugs on their inside, a vertical backmold plate fixed to said frame members, a front mold frame hinged nearits lower edge and ends upon said frame members and having inwardlyprojecting arms at its lower edge adapted to engage said lugs on saidframe members, a bottom plate provided with projections engaged in thelower edge of said front plate, and end plates pivoted along their frontedges to the ends of the front plate and engaging said bottom plate, andmeans for holding the several parts of the mold in their closedpositions.

In a machine for molding building blocks, the combination of framemembers, a vertical back mold-plate fixed thereto and having near itsends vertical forwardly projecting ribs, a front mold-plate pivoted nearits lower edge to the frame members, a bottom plate movably supportedalong its front edge by said front plate, and end plates pivoted alongtheir front edges to the ends of the front plate and adapted at theirrear edges to engage inside of the said forwardly on their lower edgesinwardly projecting fingers adapted to engage beneath the bottom plateto support it near its re: edge.

3. In a machine for molding building blocks, the combination of framemembers, a vertical back mold plate fixed thereto, a front mold platepivoted near its lower edge to said frame members and having loops nearits lower edge, a bottom plate having forwardly projecting fingers whichenter said loops, end plates pivoted along their front edges to theendsof said front plate and having fingers adapted to pass beneath thebottom plate near its rear edge and thereby to support it, and meanspreventing the end plates from swinging out when the mold is closed.

4. In a machine for molding building blocks, the combination of framemembers, with a knock down mold which includes a vertical back platefixed to the frame memt bers, a front mold plate pivoted along its loweredge'to said frame members and having a downwardly extended arm whichlies just inside of said frame members,--one of the frame members beingprovided with a lug adapted to be engaged by said arm and thereby limitthe forward swinging movement of the front plate, a bottom plate looselyconnected along its front edge with the front plate by means whichpermit a limited movement of said bottom plate relative to said frontplate, end plates hinged along their front edge to the ends of the frontplate, and means for holding themold plates in their closed positions.

5. In a machine for molding building plates, the combination of framemembers having series of holes laterally through their rear portion, avertical back plate adapted to be adjustably bolted in position throughsaid holes, front and bottom plates and end plates hinged along theirfront edges to the ends of the front plate and constructed at their topedges to affix extensions thereto and thus deepen the mold, and coressup ported from said back frame and adjustable therewith in respect tothe said frame members.

6. In a machine for molding building blocks, the combination of framemembers, and a knock down mold which includes a vertical back plateWhich is adjustably fixed to theframe member and has guide holes forhorizontally movable cores, and end plates having removable topextensions, with cores movable through said guide-ways, and mechanismmounted upon said back plate for supporting and moving said cores.

7. In a machine for molding building blocks, the combination of endsupporting members and a mold having a back plate I verticallyadjustable on said member and pro ectmg ribs on the back plate andhaving provided with core openings, in combination with a coresupporting frame fixed to said back plate and cores slidably mountedtherein and in said back plate.

8. In a machine for molding building blocks, the combination of endframe members, a knock-down mold comprising aback plate verticallyadjustable on said members and provided With core openings, a supportingframe for said cores rigidly supported on said. back plate, coresslidably mounted in said frame and back plate and removable therewith,end plates in said knock-down mold and extensions removably aflixed tothe top thereof.

9. In a machine for molding building blocks, the combination of a knockdown mold and cores movable horizontally through the back plate thereof,one or more of said cores having a vertical slot through it, a blockremovably seated on the bottom plate of the mold, and a verticaldivision plate in the mold and passing through the slot of the slottedcore and having an interlocking engagement with. said removable block.

10. In a machine for molding building blocks, the combination of a knockdown mold, and cores movable horizontally through the back platethereof, one or more of said cores having a vertical slot through it,With a block removably seated on the bottom plate of the mold and havingin it a vertical slot, and a division plate extending across the moldand passing through the slot in the slotted core and entering at itslower end the slot in said block.

In testimony whereof, \ve hereunto affix our signatures in the presenceof two Wit YlGSSQS.

HORATIO S. SCOTT. MONTIS L. DILGARD.

\Vitnesses I BEN-I. \V. MOCRAY, JOHN H. BURKHOLDER.

